The shallow magnitude 7.2 earthquake struck northwest of the town of Murindó, killing ten and injured more than a hundred.

[2] The preferred focal mechanism of this earthquake is highly debated with either thrust, reverse, or left-lateral strike-slip.

The earthquake of October 18 was slightly more complex, consisting of two events separated by a time gap of 12 seconds.

In Murindó and the Atrato Valley, shaking intensity was IX (Violent), accounting for most of the damage to human settlements.

Most of the affected areas were on low-relief terrain, with small hills that form the eastern part of the North Andes.

[1] A mud volcano in San Pedro de Uraba ejected 50,000 m3 of material, and exploded in a fiery ignition of gases, killing seven and injuring 20 while another at San Juan de Uraba emerged from the sea, creating Damaquiel Island near the coast.

Floods swept the affected towns after water overflowed from an earthquake lake on the Atrato River.

[10] Gómez Tapias, Jorge; Montes Ramírez, Nohora E.; Almanza Meléndez, María F.; Alcárcel Gutiérrez, Fernando A.; Madrid Montoya, César A.; Diederix, Hans (2015).